Power-hammer.



No. 709,780. Patented Sept. 23, I902.

C. H. KBEHBIEL. POWER HAMMER.

(Application filed May 6 1902.)

(N6 Model.) 2 Sheets-Sheet I.

WITNESSES;

A TTOH/VE VS.

No. 709,780. Patejnfed' Sept. 23, I902.

c. H. KREHBIEL.

POWER HAMMER.

(Application filed ma 1902.

(No Model.)

Urn STAJES Parent error.

CHARLES H. KREHBIEL, OF MOUNDRIDGE, KANSAS.

POWER HAM lVlER.

SPECIFICATION forming part of Letters Patent No. 709,780, dated September 23, 1902.

Application filed May 6, 1902. Serial No. 106,125. (No d l.)

To all whom it may concern:

Be itknowu that I, CHARLES H. KREHBIEL, a citizen of the United States, and a resident of Moundridge, in the county of McPherson and State of Kansas, have invented a new and Improved Power-Hammer, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved power-hammer which is simple and durable in construction, very effective in operation, and arranged to allow of convenient adjustment of the hammer relatively to the anvil at the will of the operator according to the nature of the work under treatment at the time.

The invention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the cla ms.

A practical embodiment of my invention is represented in the accompanying drawings, forming a part of this specification,in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a front perspective view of the improvement. Fig. 2 is a rear perspective view of the same. Fig. 3 is a sectional side elevation of the front portion of theimprovement, and Fig. at is a similarview of the rear portion of the improvement.

On a suitably-constructed base Ais held an anvil 15, over which reciproeates the hammer O, having its shank O mounted to slide vertically in suitable bearings carried by the frame work A, secured to or forming part of the base A. On the shank O is held to slide loosely a sleeve D, pressed on the bottom and top by springs E E, coiled 011 the shank O, and of which the spring E rests at its lower end on a shoulder O formed on the shank: O, and the other spring E abuts at its upper end against the underside of a nut C screwing on a threaded portion of the shank O to allow of regulating the tension of the springs E and E.

The shank-sleeve D is pivotally connected with a reciprocating rod F, carrying at its lower end a spring-pressed sleeve D, similar to the sleeve D and pressed on at top and bottom by springs E E said sleeve being pivotally connected with the free end of the operating-lever G, fulcrumed at G on the carrier H, fulcrumed loosely on the shaft 1 of the drums I I, said shaft 1 being journaled in suitable bearings A carried on the rear portion of the frame A. The drums I and l are fitted loosely on the shaft 1 and can be turned thereon to a desired position and then fastened in place by pins 1 each engaging one of a series of apertures I in the corresponding sleeves I I and a registering aperture in the shaft 1 as will be readily understood by referring to Fig. 4E.

The carrier II is provided with a flexible connection Jsuch as a rope, chain, or the like-extending over pulleys K and K, located one above the other and journaled in the free end of the carrier II, as is plainly indicated in the drawings, a portion of the fl6Xlble connection between said pulleys being clamped or otherwise secured to the operating-lever G, as is plainly indicated in Fig. 3, to cause the operating-lever to move with the flexible connection J when the latter is adjusted or when a swinging motion is given to the carrier II, as hereinafter more fully described.

The ends of the flexible connection .I wind in opposite directions on the drums I and I and are secured thereto by pins J. (See Figs. 2 and 4.) On the outer end of the shaft 1 is secured a handle L, extending upwardly to be within convenient reach of the operator standing in front of the machine. (See Fig. 1.)

The operator in moving the handle L upward causes a turning of the shaft 1 and its drums I I, to wind up the end of the flexible connection on the drum I and to correspondingly unwind the end of the flexible connection from the drum 1', so that the flexible connection is adjusted on the carrier H and the portion between the pulleys K K moved upward to swing the operating-lever G in a like direction.

\Vhen the handle L is moved downward, a

Bthat'is, to move it farther from or nearer to the anvil B, according to the nature of the work under treatment.

A uniform stroke is given to the hammer C from the carrier I'I, and for this purpose said carrier is pivotally connected with the eccentric-rod N of an eccentric N, secured on the shaft .0, journaled in suitable hearings on the framework A. On one end of the shaft 0 is secured a pulley P, connected by a belt with other machinery for impartinga rotary motion to said'pulley on the shaft 0, the belt being engaged by a tightening-pulley Q, journaled on a bell-crank lever Q, fulcrumed on the frame A and connected by a link Q with a foot-lever R, extending to the front of the the base A and fulcrumed thereon. When operator presses the lever B, the pulley Q tightens the belt to rotate the pulley P and shaft 0, so that the eccentric N imparts an up and down swinging motion to the carrier H to give the desired stroke to the hammer C. On the other end of the shaft O is secured a brake-wheel S, engaged by a brake-hand S, connected with a brake-lever S carrying a weight S (see Fig. 1,) to stop the hammer quickly whenever the operator releases the foot-lever R.

From the foregoing it is evident that the stroke of the hammer remains the same at all times; but the distance of the hammer from the anvil can be varied by the operator according to the nature of the work under treatment.

By having the connection between the operating-lever G and the hammer C yielding, owing to the sleeves D D and springs E E, it is evident that all undue jar is prevented and a light blow can be had on the article under treatment if the nature of the Work requires it. It will also be seen that by the arrangement described I can employ the usual accessories on the anvil such as swages, dies, &c.as the hammer C can be adjusted vertically nearer to or farther from the anvil, as previously described.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. A power-hammer comprising an operating-lever for the hammer, a carrier mounted to swing, means for imparting motion to said carrier, and a flexible connection adjustable on the carrier and attached to said operatinglever, to raise or lower the same relative to the said carrier, as set forth.

2. A power-hammer comprising an operating-lever for the hammer, a carrier mounted to swing, means for imparting a positive stroke to said carrier, a flexible connection adjustable on the carrier and attached to the said operating-lever, to move the same on the carrier, and manually-controlled means for adjusting said flexible connection on said carrier, as set forth.

3. A power-hammer comprising an operating-lever for the hammer, a carrier mounted to swing, means for imparting a positive stroke to said carrier, a flexible connection extending over pulleys on said carrier and rigidly attached to said operating-lever, drums on which wind, in opposite directions, the ends of said flexible connection, and means under the control of the operator for turning said drums, as set forth.

4. A power-hammer comprising an operating-lever for the hammer, a carrier mounted to swing, means for imparting a positive stroke to said carrier, a flexible connection extending over pulleys on said carrier and rigidly attached to said operating-lever, drums on which wind, in opposite directions, the ends of said flexible connection, and means under the control of the operator for turning said drums, said drums being held adjustably on their shaft and the latter forming the fulcrum for said carrier, as set forth.

5. A power-hammer, comprising a carrier mounted to swing, means for imparting a positive swinging motion to said carrier, an operating-lever fulcrumed on the carrier and connected with the hammer, and means secured to said operating-lever and adjustable on the said carrier to raise or lower the lever on the carrier, and thereby move the hammer to or from the anvil, as set forth.

6. A power-hammer comprising a carrier mounted to swing, means for imparting a positive swinging motion to said carrier, an operating-lever f ulcrumed on the carrier and connected with the hammer, means held adjustably on the carrier and secured to said operating-lever, said means comprising a rope extending over pulleys on the carrier, drums on which the ends of the rope wind in opposite directions, the shaft of the drums forming the fulcrum for said carrier, and a handle on said shaft and under the control of the operator for turning said drums, as set forth.

7. A power-hammer, comprising a hammer proper having a shank mounted to slide vertically, a spring-pressed sleeve held to slide loosely on the hammer-shank, a reciprocating rod pivotally connected at one end with the ham mer-sleeve and carrying a spring-pressed sleeve at its other end, an operating-lever pivotally connected at its free end with the said sleeve, a carrier mounted to swing and on which the said operating-lever is fulcrumed, means for imparting a swinging motion to the carrier, and means held adjustable on the carrier and secured to said operating-lever, as set forth. t

8. A power-hammer, comprising an operating-lever connected with the hammer, a carrier mounted to swing and carrying the said lever, means for imparting motion to said carrier, and means for adjusting the said lever on the said carrier to vary the distance of the hammer from the anvil, as set forth.

9. A power-hammer, comprising an operating-lever connected with the hammer, a carrier mounted to swing and carrying the said operating-lever, means for imparting motion to said carrier, means for moving the said lever on the carrier to adjust the hammer toward or from the anvil, and a fastening: device for said means, as set forth.

10. A power-hammer, comprising an operating-lever for the hammer, a carrier mounted to swing, means for imparting motionto said carrier, and a rope or chain attached to said operating-lever and adjustable on the carrier, as set forth.

11. A power-hammer, comprising an operating-lever forthe hammer, a carrier mounted to swing, means for imparting a positive stroke to the carrier, a flexible connection adjustable on the carrier, means connected with the ends of the said flexible connection for adjusting the same; the said connect-ion being attached between its ends to the said operate ing-lever, as set forth.

12. A power-hammer, comprising a shaft mounted to turn, an eccentric on said shaft, a carrier mounted to swing and pivotally connected with the eccentric-rod, an operatinglever fulcrumed on the carrier and connected with the hammer, a rope extending over pulleys on the carrier, and connected with the operating-lever, drums on which the ends of the rope wind in opposite directions, and means under the control of the operator for turning said drums.

13. A power-hammer, comprising a carrier mounted to swing, means for imparting a swinging" motion to the carrier, an operatinglever fulcrumed at one end on the carrier, a rod connecting the other end of said lever with the hammer, a flexible connection secured to the operating-lever and adjustable on the carrier, and means connected with the ends of said flexible connection for moving the same in opposite directions as set forth.

14. A power-hammer, comprising a shaft mounted to turn, a carrier mounted to swing loosely on the shaft, means for imparting a positive stroke to the carrier, an operatinglever for the hammer, the said lever being fnlcrumed on the carrier, drums adjustable on the shaft, means for fastening the drums in position on the shaft, and a flexible connection adjustable on the carrier, the said connection being attached to the operatinglever and connected at its ends with the said drums, as set forth.

CHARLES H. KREHBIEL.

Vitnesses:

H. A. EYMANN, E. E. BUTLER. 

